Pneumatic tire.



R. T. 'BADGLEY. PNE UMATIO TIRE. APPLICATION FILED MAR.13, 1909.

952,175 Patented Mar. 15,1910.

WITNESSES: INVENTOR. 71% m s afim I I ATTORNEY.

' tractive effect between the tire and the road barren sTaTasraTn-r1ron ROBERT T. BADGLEY, or NEW YORK, N,

PNEUMATIC TIRE.

Specification of Letters Patent.

Patented Mar. 15, 1910.

Application filed March 13, 1909. Serial No. 483,308.

a pneumatic tire, or a tread member ap-.

plicable'to such a tire, having at the same time a high de 'ree of resiliency and an effective form for securing a hold or a surface.

An embodiment of my invention is illustrated in the accompanying drawings, in which- Figure 1 is a transverse. section of a tire and rim, and Fig. 2 is a plan view of a portion of the tread.

My invention may be embodied either in the tire itself as originally manufactured, or in a tread-band applicable to a finished tire. I have illustrated the invention in the latter forin. For this purpose I provide a rubber band or envelop 1 which is backed and reinforced by suitable fabric 2 upon its inner surface, and is formed to embrace the periphery and the sides of an ordinary pneumatic tire 3.

The hollow projections before referred to are, in the illustrated embodiment of the invention, of annular form, 5, and they inclose' air-chambers 6 of corresponding form. It will be apparent that the thickness'of the tread is in. no degree increased by the projections 5, and that the projections may readily yield, when necessary, until they are substantially flat, so that they cannot be worn and torn away as in the case of solid rubber projections.

The. tread-band 1 may be secured to the tire in any convenient way, as for. example, by the cold or acid processof vulcanization.

' My invention is not limited to the embodiment hereinbefore specifically described, but

may be embodied in many forms within the,

nature of the invention and the terms of the following claims:

I claim: I

1. A. pneumatic tire having its tread surface provided with projections, depressions within the area bounded by said projections,

and air-chambers beneath said projections,

as set forth.

2. The combination with the outer tube of a pneumatic tire, of a tread band adapted to be applied thereto and provided with projections, depressions within the area bounded by said projections, and air chambers beneath said projections, the outer surface of said outer tube forming the bottoms of said air-chambers, as set forth.

ROBERT T. BADGLEY.

" I In the presence of 

